package com.example.boke.utils;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.StrUtil;
import com.auth0.jwt.JWT;
import com.auth0.jwt.algorithms.Algorithm;
import com.example.boke.entity.User;
import com.example.boke.mapper.UserMapper;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.Date;
import com.example.boke.entity.Goods;

/**
 * 功能：用户登录token
 * @author fx
 * @since 2025-02-16 19:41:55
 */
@Component
public class TokenUtils {

    private static UserMapper staticUserMapper;
    /**
     * 生成token
     *
     * @return token
     */
    public static String createToken(String userId, String sign) {
        return JWT.create().withAudience(userId) // 将 user id 保存到 token 里面,作为载荷
                .withExpiresAt(DateUtil.offsetHour(new Date(), 2)) // 2小时后token过期
                .sign(Algorithm.HMAC256(sign)); // 以 password 作为 token 的密钥
    }

    /**
     * 获取当前登录的用户信息
     *
     * @return user对象
     */
     public static User getCurrentUser() {
         try {
             HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
             String token = request.getHeader("token");
             if (StrUtil.isNotBlank(token)) {
                 String userId = JWT.decode(token).getAudience().get(0);
                 return staticUserMapper.selectById(Integer.valueOf(userId));
             }
         } catch (Exception e) {
             return null;
         }
         return null;
     }

}


